South African Soprano, Johanni van Oostrum came to the attention of the international opera scene when, at short notice, she successfully took over the role of Marschallin in Richard Strauss' Der Rosenkavalier under the baton of Sir Simon Rattle at the Dutch National Opera in Amsterdam with the Rotterdam Philharmonic Orchestra. She has since come to prominence singing leading soprano roles by Mozart, Wagner and Strauss.
She has performed under conductors such as Ivor Bolton, Stefan Soltesz, Massimo Zanetti, Jacques Lacombe, Henrik Nánási, Konrad Junghänel, Mirga Gražinytė-Tyla, Antonello Manacorda, Dirk Kaftan, Stefan Solyom, Martin Hoff, Gianluca Marciano, Nicholas Milton, Ed Spanjaard, Kirill Karabits, Alexander Rumpf, Jan Stulen, Jan Willem de Vriend and Kristiina Poska and worked with directors such as Harry Kupfer, Andreas Homoki, Barrie Kosky, Tobias Kratzer, Stephen Lawless, Florentine Klepper, Vera Nemirova and Jürgen Weber.
Johanni van Oostrum has appeared as guest soloist at the Bolshoi Theatre Moscow (Feldmarschallin Der Rosenkavalier), the Bavarian State Opera Munich La Contessa Le nozze di Figaro, the National Opera Amsterdam Feldmarschallin/ Der Rosenkavalier, the Hessian State Theatre of Wiesbaden La Contessa/ Le nozze di Figaro, Elsa/ Lohengrin, the Komische Oper Berlin Feldmarschallin/ Der Rosenkavalier, Micaela/ Carmen, First Lady/ Die Zauberflöte, Antonia/ Hoffmanns Erzählungen, the Deutsches Nationaltheater Weimar Elsa/ Lohengrin, Feldmarschallin/ Der Rosenkavalier, Mimì/ La Bohème, the Graz Opera Grete/ Der ferne Klang, the Heidelberg Theatre Senta/ Der fliegende Holländer, the Theatre Bonn Judith Holofernes, Senta Der fliegende Holländer, the Royal Concertgebouw in Amsterdam La Contessa/ Le nozze di Figaro, the Estonian National Opera Feldmarschallin/ Der Rosenkavalier, The National Theatre Brno Titel Role in Katja Kabanová, and in theatres in Enschede La Contessa/ Le nozze di Figaro and Maastricht La Contessa/ Le nozze di Figaro, Feldmarschallin/ Der Rosenkavalier, Titel Role in Katja Kabanová).
Highlights for the 2016-17 Season include Johanni van Oostrum´s return to the Bavarian State Opera Munich as La Contessa/ Le nozze di Figaro, her role debut as Eva/ Die Meistersinger von Nürnberg at the Komische Oper Berlin, her role debut as Ellen Orford/ Peter Grimes at the Hessian State Theatre of Wiesbaden, and her return to the Bolshoi Theatre Moscow as Feldmarschallin/ Der Rosenkavalier.
As a concert artist she regularly appears in Strauss' Four Last Songs, Beethoven's Symphony Nr. 9, Brahms' Ein deutsches Requiem, Pergolesi’s Stabat Mater, the Verdi Requiem, Haydn’s The Creation, Händel’s Messiah, and the Elias by Mendelssohn-Bartholdy.
Johanni van Oostrum is a graduate of the University of Pretoria in South Africa. She received vocal training from Dr. Mimi Coertse and was a member of the Black Tie Opera. She won the Erna Spoorenberg Dutch Vocal Competition and the Ruth Lopin Nash Award from the Oratorio Society of New York at the de Weill Recital Hall at Carnegie Hall.